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我的問題是,我不能使用遊標從數據庫檢索的數據,並在所有情況下的SQLite將引發異常SQLite和光標
db.execSQL("CREATE TABLE BOOKS ("
+ "_ID INTEGER PRIMARY KEY AUTOINCREMENT, "
+ "Name TEXT, "
+ "Sub_Field TEXT, "
+ "Cover INTEGER, "
+ "Priority INTEGER);");
ContentValues BookValue = new ContentValues();
BookValue.put("Name", "Cisco");
BookValue.put("Sub_Field", "Net");
BookValue.put("Cover", R.drawable.cappuccino);
BookValue.put("Priority", 1);
db.insert("BOOKS", null, BookValue);
MainActivity:
try {
SQLiteOpenHelper myDatabase = new myDatabase(this);
db = myDatabase.getWritableDatabase();
myText = (TextView) findViewById(R.id.txt);
cursor = db.query("BOOK", new String[] {"Name", "Sub_Field"}, null,null, null, null,null);
if (cursor != null) {
cursor.moveToFirst();
String name = cursor.getString(0);
myText.setText(name);
}
} catch (SQLiteException e) {
myText = (TextView) findViewById(R.id.txt);
myText.setText("Try Again, you're soon to achieve your Goal...");
myText.setTextSize(20);
}
添加你的正在發生的問題plz –
'Slqite異常錯誤'意味着你有一些SQLite的問題。有關更多信息,您應該閱讀錯誤消息和堆棧跟蹤。 –
錯誤是什麼?嘗試添加'Log.d(「TAG」,「exception =」+ e.toString());'在catch(SQLiteException e){}'中記錄錯誤。 –